US PATENT SUBCLASS 417 / 542
.~.~ Inlet and discharge spaces

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
540  DF  .~ Having pulsation dampening fluid receiving space {3}
542.~.~ Inlet and discharge spaces

DEFINITION

Classification: 417/542

(under subclass 540) Apparatus in which a fluid receiving or confining means is provided both upstream of the means to control the flow of fluid into the chamber and downstream of the means to control the flow of fluid from the chamber.